Air-duct and connection for self-playing grand pianos.



No. 867,114. PATENTED SEPT. 24, 1907. J. W. DARLEY, JR- AIR DUCT AND CONNECTION FOR SELF PLAYING GRAND PIANOS.

APPLIUATIQN FILED OUT. 22. 1906.

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amvemtoz (EH/tome $1 .No. 867,114. PATENTED SEPT. 24, 1907.

J. W. DARLEY, J3.

AIR DUCT AND CONNECTION FOR SELF PLAYING GRAND PIANOS. APPLIOATIOI nun 001222 1906.

2 SHEETS-SHEET [5 fan HILL. comics! The objecu I showmg 1m; of he m0 vsele sirnilzn' View Y re =1 placed, thish folding lid oi cever m, hithe m, and so she: it inusie re Withhr 3 box locate; usic-rolls 7' and s, and the tracker beard i, cennected by tubes 1/, with the pneumatic part-ion of ihe apparatus The hex containing h e box nrfrern tubes u, airs; hoard. These tubes headers, and the large box piano case, so ihat 'h about the his a-ce trolls 3,1 be folded pert-is '11 is hinged e entire hex. c n

n represents the 00X. '9 sition. I

The pneumatic converge together any s over a plate in the centralpart of the box a), and in the rear of he and underneath the tn the pumpers 3; These pumpers are provided with the usual discharge onenings and vsives. .oiahle carers.

and valves, is l {I i. 1011. The springs 3 attached. $0 i-h AN COHLE-U'EICI? F03 SELF-PLAYING GRAND 3? aw. (in of Letters Patent.

Patented Sept. 24. 1907.

' ifided and this applicmiou filed October 22, 1906.

.. trunk i3 Lhreum he pmion 18 a; ihrough' a passage in the coupmember 15 1,0 the passage 8, the niemh 9 and 15 filing againsteach other and having 21 covering 10 of leather "imilar material between them i0 make ah tight joint. To still further insure an airtight "1e i-lie means shown in the drawing, in ii represents a. flange on the end of the trunk a movihl'ecoupling member psnillei Shereto Springs 17 tend in press themenihei 3. 5 away 1'1. in the fiimge lined against the mesa} The portion 18 0f the wells of the passage 12 is made flexible, so as to permit the movement- 05 the member 15, so thlt when he 21 is iolded down into the pnsiiion shown Ln which is i s normal posi en, a Light jet-iiv will lied beiwecn the members i) an 15 My means of e pushing 10; in F 3 the be i) i. own as raised, '1 vreupon the member laiis raised. by Lille springs 17 until stopped by the screws 16. Ialsc use a similar construction produce a tight joint between the the pneumatic tubes lead from me tracker board, and from the pneumatic box. The is movahly attached in the rear m of 1.1 by meaTns 01 screws 13S, threaded .hiLe Elle 1 in; snid'hender in Contact with the packing 135, which is secured on the 11eede1l36 in which are headed the pipes 170 which lead to the pneumatic boxnot files. the he is feided down, the reverse place and Light joint, is 'ghus nisintained. Having Lhus d eribed my invention, whq t I claim new and dc to secure by Letters Patent. of the United States, isz

lfIu self playing gnarl piano, the combination of an air duct having walls made in sections adapted to neldingly fold against-each other, and means for keeping said sections-in contact with each other under spring :ension, substantially as described.

2. In a self-playing g'i'und piano, the combination e made in sections, One. ml "LiI1SE Ll1C other, and means for said sections in contact wring :in uii tight juint when substantially as de L'i'beil. 115- piano, the eomuinatieu of action t:

ed to 0141 ntlv he putts L I s self-gnawing tension, substantially as described.

an flil-(1llCt made in sections, members surrounding the' 4. In a self-playing grand piano, the combination of an air duct. made in sections, members surrounding the ends of said sections where they join together, one of the members in air tight contactwith each i'other; substantially as described.

5. In a self-playing-grand piano, the'combination of a hinged boxprovided with a perforated member forming an air passage, an air-trunk provided with amovable member, said air trunk and member having a passage therethro'ugh, a portion of the walls of said passage being flexible, springs-for holding said movable member in contact with the member on said box, and screwsfor'limiting the movement ot'said member, substantially as described.

6. In a self-playing grand piano, the combination of a hinged box adapted to carry the music rolls and tracker board, a member attached to said box and perforated to form an air passage, said member being provided with a yielding cover, an air trunk provided with a movable member, said member and air trunk having, an air passage .therethrough, part of the wallsof saidair passage being flexible, springs located between the top of said air trunk and said movable member, and screws for limiting the movement of said movable member, scribed. v

Ilntestimony whereof, I aflix my signature, in presence of two witnesses.

substantially as de- 

